/Engine/Plugins/Experimental/VirtualProductionUtilities/Source/VPUtilities/Public/Widgets/Fullscreen/VPFullScreenUserWidget_PostProcessWithSVE.h
Functors may be registered before or after the widget is displayed that is before Display(...) is called. All functors are not retained when Hide(...) is called: they are removed
void RegisterIsActiveFunctor ( [FSceneViewExtensionIsActiveFunctor](API\Runtime\Engine\FSceneViewExtensionIsActiveFunct-) IsActiveFunctor )